> ## Documentation Index
> Fetch the complete documentation index at: https://eo.utopy.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Minimal router

> A small router with one Effect procedure.

This example is the smallest useful `effect-orpc` router.

```ts title="router.ts" theme={null}
import { Effect } from "effect";
import { eos } from "effect-orpc";
import * as z from "zod";

class Greeter extends Effect.Service<Greeter>()("Greeter", {
  accessors: true,
  sync: () => ({
    greet: (name: string) => `Hello, ${name}!`,
  }),
}) {}

const procedure = eos.provide(Greeter.Default);

export const router = {
  greet: procedure
    .input(z.object({ name: z.string() }))
    .output(z.string())
    .effect(function* ({ input }) {
      return yield* Greeter.greet(input.name);
    }),
};

const greet = router.greet.callable();
console.log(await greet({ name: "Ada" }));
```

## What to copy

Copy this shape when you need:

* one base Effect layer
* one reusable procedure builder
* direct invocation

## Next step

Add auth with [Auth and current user](/examples/auth-current-user).